CN114701301A - Electrically-driven axle and vehicle - Google Patents
Electrically-driven axle and vehicle Download PDFInfo
- Publication number
- CN114701301A CN114701301A CN202210637925.1A CN202210637925A CN114701301A CN 114701301 A CN114701301 A CN 114701301A CN 202210637925 A CN202210637925 A CN 202210637925A CN 114701301 A CN114701301 A CN 114701301A
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- China
- Prior art keywords
- axle
- brake
- housing
- axle housing
- gear
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
- B60B35/12—Torque-transmitting axles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
- B60B35/12—Torque-transmitting axles
- B60B35/121—Power-transmission from drive shaft to hub
- B60B35/122—Power-transmission from drive shaft to hub using gearings
- B60B35/125—Power-transmission from drive shaft to hub using gearings of the planetary type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
- B60B35/12—Torque-transmitting axles
- B60B35/16—Axle housings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/02—Arrangement or mounting of electrical propulsion units comprising more than one electric motor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/043—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
- B60K17/046—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel with planetary gearing having orbital motion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/06—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing
- B60K17/08—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing of mechanical type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
- B60T1/065—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels employing disc
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
Abstract
The invention relates to the technical field of vehicles, in particular to an electrically driven axle and a vehicle. The electrically driven axle comprises an axle housing, two motors, two primary speed reducers, two half shafts, two brake assemblies and two wheel-side speed reducers, wherein the two motors and the two primary speed reducers are arranged in the central axle housing; the input end of the primary speed reducer is connected with a motor shaft; one end of the half shaft is connected with the output end of the primary speed reducer; the brake assembly comprises a brake shell and brake components arranged in the brake shell, the two brake shells are respectively connected to the left axle housing and the right axle housing, the two groups of brake components respectively brake the two half axles, and the brake components can simultaneously execute service braking and parking braking; the input end of the hub reduction gear is in transmission connection with the other end of the half shaft, and the output end of the hub reduction gear is connected with the wheel hub. The invention has higher reliability, can be suitable for the existing tire size, and provides a scheme capable of simultaneously executing service braking and parking braking.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to an electrically driven axle and a vehicle.
Background
At present, the arrangement modes of motors of a mining vehicle drive axle powered by new energy are various. The most conventional structure is that a driving motor drives a gearbox, and the gearbox is connected with a drive axle through a transmission shaft so as to drive a vehicle. The scheme is simple to replace a traditional internal combustion engine by an electric motor, and basically has no great change to a gearbox and a drive axle. The structure is theoretically that the gearbox is a redundant structure, the efficiency of the transmission system of the whole vehicle is low, and the cost is high. And because the gearbox has many gears, no matter be mechanical structure gearbox or automatic transmission gearbox, always can have the smoothness problem of shifting.
The structure is more applied to the traditional small-tonnage road dump truck and the commercial vehicle, the motors are more arranged on the front side and the rear side of the drive axle, and then power is transmitted to a main speed reducer of the drive axle through the motors and then transmitted to a wheel-side speed reducer so as to drive the vehicle to move. The scheme is not suitable for being applied to mine vehicles, and has great challenges to the reliability of the whole system due to the fact that the number of motor suspension vehicle bridges is large, the weight is large, the roads in a mining area are poor, and the vibration is large.
In other large foreign electric drive rigid mine cars, the driving motor is usually directly arranged at the wheel edge end, namely, the driving motor is directly arranged on a wheel edge reducer, and tires are arranged on the wheel edge reducer. The structure has high transmission efficiency, but is suitable for matching with a larger tire.
Aiming at the current domestic electric transmission scheme of 90-120 ton-grade mining vehicles, if the scheme that a motor is externally hung on a drive axle is adopted, the reliability is insufficient, and the arrangement of a whole vehicle suspension system is difficult; a large-scale foreign electric transmission scheme is adopted, and the motor and the speed reducer cannot be arranged due to insufficient size of the tire. Therefore, an electrically driven axle is urgently needed to solve the technical problems.
Disclosure of Invention
The invention aims to provide an electrically driven axle and a vehicle, which have high reliability, can be suitable for the existing tire size, and provide a scheme capable of simultaneously executing service braking and parking braking.
In order to achieve the purpose, the invention adopts the following technical scheme:
an electrically driven axle, comprising:
the axle housing comprises a central axle housing, a left axle housing and a right axle housing, wherein the left axle housing and the right axle housing are connected to two sides of the central axle housing;
the two motors are arranged in the central axle housing, and motor shafts of the two motors are arranged in a back-to-back manner;
the two primary speed reducers are arranged in the central axle housing, correspond to the two motors one by one, and are in transmission connection with the motor shafts at the input ends;
the two half shafts correspond to the two primary speed reducers one by one, and one ends of the half shafts are connected with the output ends of the primary speed reducers;
the two brake assemblies respectively comprise brake housings and brake components arranged in the brake housings, the two brake housings are respectively connected to one sides, far away from the central axle housing, of the left axle housing and the right axle housing, the two groups of brake components respectively brake the two half shafts, and the brake components can simultaneously execute service braking and parking braking;
the two hub reduction gears are respectively connected to the two brake shells and are in one-to-one correspondence with the half shafts, the input ends of the hub reduction gears are in transmission connection with the other ends of the half shafts, and the output ends of the hub reduction gears are connected with the wheel hubs.
As the preferred technical scheme of electric drive axle, the primary speed reducer includes first ring gear, first sun gear, first planet gear and first planet carrier, first ring gear with central axle housing fixed connection, the fixed cover of first sun gear is located on the motor shaft, first sun gear with first planet gear meshing, first planet gear with first ring gear meshing, first planet gear with first planet carrier rotates the connection, first planet carrier with the semi-axis is connected.
As a preferable technical solution of the electrically driven axle, two first bearings are provided between the first carrier and the center axle housing.
As the preferred technical scheme of electrically-driven axle, the brake assembly includes stationary blade, friction disc, butterfly spring, service brake piston and parking brake piston, service brake piston with be formed with first oil pocket between the stopper casing, parking brake piston with be formed with the second oil pocket between the stopper casing, it is a plurality of the stationary blade is with a plurality of the friction disc sets up in a staggered way, and is located service brake piston keeps away from one side of parking brake piston, the stationary blade with stopper casing fixed connection, the friction disc with the semi-axis passes through splined connection, and can follow the semi-axis rotates, the butterfly spring with compression state set up in one side that service brake piston kept away from.
As a preferred technical scheme of the electrically driven axle, a transition sleeve is fixedly sleeved on the half shaft, and the friction plate is connected with the transition sleeve through a spline.
As the preferred technical scheme of electric drive axle, the wheel reduction includes reduction gear housing and set up in second ring gear, second sun gear, second planet wheel and second planet carrier in the reduction gear housing, electric drive axle still includes two axle sleeves, two axle sleeves respectively with two the brake casing is connected, the semi-axis is worn to locate the axle sleeve, the fixed cover of second sun gear is located on the semi-axis, the second sun gear with the meshing of second planet wheel, the second planet wheel with the meshing of second ring gear, second ring gear and axle sleeve fixed connection, the second planet wheel with the second planet carrier is connected, the second planet carrier with reduction gear housing connects, reduction gear housing with wheel hub fixed connection.
As a preferred technical scheme of the electrically driven axle, a gear ring bracket is fixedly arranged on the semi-axle sleeve, and the second gear ring is fixed on the gear ring bracket.
As a preferred technical solution of the electrically driven axle, two second bearings are provided between the reducer housing and the axle sleeve.
As the preferred technical scheme of electrically driven axle, the central axle case includes first central axle case and second central axle case of interconnect, one of them the motor with one the primary reducer sets up in the first central axle case, another the motor with another the primary reducer sets up in the second central axle case.
A vehicle comprises a front driving axle and a rear driving axle, wherein the front driving axle and the rear driving axle adopt the electric driving axle of any one scheme.
The invention has the beneficial effects that:
the electrically driven axle provided by the invention has the advantages that firstly, a main speed reducer structure of the traditional driving axle is cancelled, the motor is arranged in the central axle housing, the motor is prevented from being suspended, the running reliability of a vehicle is improved, the electrically driven axle is suitable for the size of the existing tire, in addition, the motor is limited by the installation space in the central axle housing, the motor generally adopts a small-torque high-rotation-speed motor, in order to ensure the driving torque required by the whole vehicle, a two-stage speed reducer is adopted as a speed reducing mechanism, a first-stage speed reducer is arranged at the end of the motor, a wheel-side speed reducer is used as a second-stage speed reducer, a half shaft is adopted for connecting the first-stage speed reducer and the second-stage speed reducer, after the motor with high rotation speed is reduced by the speed reduction of the first-stage speed reducer, the rotation speed is reduced, and the wheel-side speed reducer is connected through the half shaft, so that the dynamic balance requirements and the processing requirements on the half shaft and the wheel-side speed reducer are reduced, and the reliability is guaranteed; secondly, the primary speed reducer is also arranged inside the central axle housing, and the arrangement mode is simple and novel; finally, with brake assembly modularized design to the setting is in the wheel limit end of axle housing, easy dismounting, the brake assembly can directly brake the semi-axis, and can carry out service braking and parking braking simultaneously, has solved the problem that needs possess service braking and parking braking simultaneously, and the brake casing of brake assembly constitutes the axle housing whole with central authorities axle housing and left axle housing and right axle housing jointly simultaneously, and the brake casing can regard as the holistic part of axle housing promptly, plays the supporting role.
Drawings
FIG. 1 is a schematic structural diagram of an electrically driven axle provided by an embodiment of the present invention;
FIG. 2 is a front view of an electrically driven axle provided by an embodiment of the present invention;
FIG. 3 is a cross-sectional view taken along A-A of FIG. 2;
FIG. 4 is an enlarged view of a portion of FIG. 3 at B;
fig. 5 is a partially enlarged view at C in fig. 3.
In the figure:
11. a central axle housing; 111. a first center axle housing; 112. a second center axle housing; 12. a left axle housing; 13. a right axle housing;
20. a motor; 21. a motor shaft;
31. a first bearing; 32. a first ring gear; 33. a first sun gear; 34. a first planet gear; 35. a first carrier;
40. a brake housing; 41. a fixing sheet; 42. a friction plate; 43. a butterfly spring; 44. a service brake piston; 45. a parking brake piston;
50. a half shaft; 51. a half-shaft sleeve; 511. a ring gear support;
60. a transition sleeve;
70. a hub reduction gear; 71. a reducer housing; 72. a second ring gear; 73. a second sun gear; 74. a second planet wheel; 75. a second planet carrier; 76. a second bearing.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings and the embodiment. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplicity of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
As shown in fig. 1 to 5, the embodiment of the present invention provides an electrically driven axle, which includes an axle housing, two electric motors 20, two primary speed reducers, two half shafts 50, two brake assemblies, and two wheel reducers 70, wherein the axle housing includes a central axle housing 11, and a left axle housing 12 and a right axle housing 13 connected to both sides of the central axle housing 11; the two motors 20 are arranged in the central axle housing 11, and motor shafts 21 of the two motors 20 are arranged oppositely; the two primary speed reducers are arranged in the central axle housing 11, correspond to the two motors 20 one by one, and the input ends of the primary speed reducers are connected with a motor shaft 21; the two half shafts 50 correspond to the two primary speed reducers one by one, and one end of each half shaft 50 is connected with the output end of each primary speed reducer; the brake assembly comprises brake housings 40 and brake components arranged in the brake housings 40, the two brake housings 40 are respectively connected to one sides of the left axle housing 12 and the right axle housing 13 far away from the central axle housing 11, the two groups of brake components respectively brake the two half shafts 50, and the brake components can simultaneously execute service braking and parking braking; the two hub reduction gears 70 are respectively connected to the two brake housings 40 and are in one-to-one correspondence with the two half shafts 50, the input end of the hub reduction gear 70 is in transmission connection with the other end of the half shaft 50, and the output end of the hub reduction gear 70 is connected with a hub.
Firstly, a main reducer structure of a traditional driving axle is cancelled, a motor 20 is arranged in a central axle housing 11, the motor 20 is prevented from being suspended, the running reliability of a vehicle is improved, the vehicle is suitable for the size of the existing tire, in addition, the vehicle is limited by the installation space in the central axle housing 11, the motor 20 generally adopts a small-torque high-rotation-speed motor 20, in order to ensure the driving torque required by the whole vehicle, a two-stage speed reducing device is adopted as a speed reducing mechanism, a first-stage speed reducer is arranged at the end of the motor 20, a wheel-side speed reducer 70 is used as a second-stage speed reducer, a half shaft 50 is adopted for connecting the first-stage speed reducer and the second-stage speed reducer, after the speed of the high-rotation-speed motor 20 is reduced through the first-stage speed reducer, the rotation speed is reduced, and then the wheel-side speed reducer 70 is connected through the half shaft 50, so that the dynamic balance requirement and the processing requirement on the half shaft 50 and the wheel-side speed reducer 70 are reduced, and the reliability is ensured; secondly, the primary speed reducer is also arranged inside the central axle housing 11, and the arrangement mode is simple and novel; finally, with brake assembly modularized design, and set up the wheel limit end at the axle housing, easy dismounting, the brake assembly can directly brake semi-axis 50, and can carry out service braking and parking braking simultaneously, the problem that needs possess service braking and parking braking simultaneously has been solved, the axle housing is whole jointly constituteed with central authorities axle housing 11 and left axle housing 12 and right axle housing 13 to the stopper casing 40 of while brake assembly, brake casing 40 can regard as the holistic part of axle housing promptly, play the supporting role. It should be noted that, the service brake is generally executed by a service brake, the parking brake is executed by a parking brake, the service brake is generally installed at the wheel rim end, and when the service brake adopts a hydraulic disc brake, the parking brake needs to be installed at the same time; when the service brake adopts an air disc brake, the air disc brake structure can be used as the service brake and a parking brake, and the parking brake problem does not need to be additionally considered. The brake assembly of the embodiment of the invention adopts a wet braking scheme, can execute service braking and parking braking, and provides a brand new service braking and parking braking scheme.
In this embodiment, referring to fig. 4, the primary speed reducer includes a first ring gear 32, a first sun gear 33, a first planet gear 34, and a first carrier 35, the first ring gear 32 is fixedly connected to the central axle housing 11, the first sun gear 33 is fixedly sleeved on the motor shaft 21, the first sun gear 33 is engaged with the first planet gear 34, the first planet gear 34 is engaged with the first ring gear 32, the first planet gear 34 is rotatably connected to the first carrier 35, and the first carrier 35 is connected to the axle shaft 50. The first sun gear 33 is an input end of the primary speed reducer, and the first planet carrier 35 is an output end of the primary speed reducer. The primary speed reducer can perform primary speed reduction on the high rotation speed of the motor 20. Preferably, two first bearings 31 are provided between the first planet carrier 35 and the central housing 11.
Referring to fig. 5, the brake assembly includes a fixing plate 41, a friction plate 42, a butterfly spring 43, a service brake piston 44 and a parking brake piston 45, a first oil chamber is formed between the service brake piston 44 and the brake housing 40, a second oil chamber is formed between the parking brake piston 45 and the brake housing 40, the fixing plates 41 and the friction plates 42 are alternately arranged and located on one side of the service brake piston 44 away from the parking brake piston 45, the fixing plates 41 are fixedly connected with the brake housing 40, the friction plates 42 are connected with the half shaft 50 through splines and can rotate along with the half shaft 50, and the butterfly spring 43 is arranged on one side of the parking brake piston 45 away from the service brake piston 44 in a compressed state. When the vehicle is stationary, the parking brake piston 45 and the service brake piston 44 move towards the direction close to the friction plate 42 under the elastic force of the butterfly spring 43, so that the friction plate 42 is pushed to be combined with the fixed plate 41, and the parking of the vehicle is realized; when the vehicle runs, the hydraulic oil in the first oil cavity pushes the service brake piston 44 to move towards the direction far away from the friction plate 42, and simultaneously the hydraulic oil in the second oil cavity pushes the parking brake piston 45 to move towards the direction far away from the friction plate 42, so that the friction plate 42 is separated from the fixed plate 41, and the brake is released; when service braking needs to be executed, the hydraulic oil in the first oil chamber pushes the service braking piston 44 to move towards the direction close to the friction plate 42, so that the friction plate 42 is pushed to be combined with the fixing plate 41, and service braking is realized. Preferably, the half shaft 50 is fixedly sleeved with a transition sleeve 60, and the friction plate 42 is connected with the transition sleeve 60 through splines so as to avoid machining the splines on the half shaft 50.
With continued reference to fig. 5, the hub reduction gear 70 includes a reduction gear housing 71, a second gear ring 72, a second sun gear 73, a second planet gear 74 and a second planet carrier 75, which are disposed in the reduction gear housing 71, the electric drive axle further includes two axle sleeves 51, the two axle sleeves 51 are respectively connected with the two brake housings 40, the axle shaft 50 penetrates through the axle sleeves 51, the second sun gear 73 is fixedly sleeved on the axle shaft 50, the second sun gear 73 is engaged with the second planet gear 74, the second planet gear 74 is engaged with the second gear ring 72, the second ring gear 72 is fixedly connected with the axle sleeves 51, the second planet gear 74 is connected with the second planet carrier 75, the second planet carrier 75 is connected with the reduction gear housing 71, and the reduction gear housing 71 is fixedly connected with the hub. The second sun gear 73 is an input end of the wheel reduction gear 70, and the second carrier 75 is an output end of the wheel reduction gear 70. The wheel reduction gear 70 is arranged to perform two-stage speed reduction, so that the effects of increasing the reduction ratio of the electrically driven axle, improving the rotating speed of the motor shaft 21, reducing the size and weight of the motor 20 and improving the operating efficiency of the motor 20 can be achieved.
Preferably, the axle sleeve 51 is fixedly provided with a ring gear bracket 511, and the second ring gear 72 is fixed to the ring gear bracket 511. By providing the ring gear bracket 511, the second ring gear 72 is more easily fixed. Preferably, two second bearings 76 are provided between the reducer case 71 and the half-shaft bushing 51, and the second bearings 76 are used for supporting the reducer case 71 to rotate.
Further, in the present embodiment, the center axle case 11 includes a first center axle case 111 and a second center axle case 112 that are connected to each other, wherein one electric machine 20 and one primary reduction gear are disposed in the first center axle case 111, and the other electric machine and the other primary reduction gear are disposed in the second center axle case 112. By providing the center axle housing 11 as a separate body, assembly of the motor 20 and the primary speed reducer is facilitated. Alternatively, in other embodiments, the first center axle housing 111 and the second center axle housing 112 may also be integrally formed, and are not limited to the embodiment.
The embodiment of the invention also provides a vehicle which comprises a front driving axle and a rear driving axle, wherein the front driving axle and the rear driving axle both adopt the electric driving axle.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. An electrically driven axle, comprising:
the axle housing comprises a central axle housing (11), a left axle housing (12) and a right axle housing (13) which are connected to two sides of the central axle housing (11);
the two motors (20) are arranged in the central axle housing (11), and motor shafts (21) of the two motors (20) are arranged in a back-to-back manner;
the two primary speed reducers are arranged in the central axle housing (11), correspond to the two motors (20) one by one, and are in transmission connection with the motor shaft (21);
the two half shafts (50) correspond to the two primary speed reducers one by one, and one ends of the half shafts (50) are connected with the output ends of the primary speed reducers;
the two brake assemblies respectively comprise a brake shell (40) and brake components arranged in the brake shell (40), the two brake shells (40) are respectively connected to one sides, far away from the central axle housing (11), of the left axle housing (12) and the right axle housing (13), the two sets of brake components respectively brake the two half shafts (50), and the brake components can simultaneously execute service braking and parking braking;
the two hub reduction gears (70) are respectively connected to the two brake shells (40) and correspond to the half shafts (50) one to one, the input end of the hub reduction gear (70) is in transmission connection with the other ends of the half shafts (50), and the output end of the hub reduction gear (70) is connected with a hub.
2. The electrically driven axle according to claim 1, characterized in that the primary speed reducer comprises a first ring gear (32), a first sun gear (33), a first planet gear (34) and a first planet carrier (35), the first ring gear (32) is fixedly connected with the central axle housing (11), the first sun gear (33) is fixedly sleeved on the motor shaft (21), the first sun gear (33) is meshed with the first planet gear (34), the first planet gear (34) is meshed with the first ring gear (32), the first planet gear (34) is rotatably connected with the first planet carrier (35), and the first planet carrier (35) is connected with the half shaft (50).
3. Electrically driven axle according to claim 2, characterized in that two first bearings (31) are provided between the first planet carrier (35) and the central axle housing (11).
4. Electrically driven axle according to claim 2, characterized in that the brake assembly comprises a stator plate (41), a friction plate (42), a disc spring (43), a service brake piston (44) and a parking brake piston (45), a first oil chamber is formed between the service brake piston (44) and the brake housing (40), a second oil chamber is formed between the parking brake piston (45) and the brake housing (40), a plurality of stator plates (41) are arranged alternately with a plurality of friction plates (42) and are located on the side of the service brake piston (44) remote from the parking brake piston (45), the stator plates (41) are fixedly connected with the brake housing (40), the friction plates (42) are splined with the half-shafts (50) and can rotate with the half-shafts (50), the disc spring (43) is arranged in a compressed state on the parking brake piston (45) remote from the service brake piston (45) One side of the plug (44).
5. The electrically driven axle according to claim 4, characterized in that a transition sleeve (60) is fastened to the half shaft (50), the friction plates (42) being splined to the transition sleeve (60).
6. Electrically driven axle according to claim 1, characterised in that the wheel-side reduction gear (70) comprises a reduction gear housing (71) and a second ring gear (72), a second sun gear (73), second planet gears (74) and a second planet carrier (75) which are arranged in the reduction gear housing (71), the electrically driven axle further comprises two axle sleeves (51), the two axle sleeves (51) are respectively connected with the two brake housings (40), the axle shaft (50) penetrates through the axle sleeves (51), the second sun gear (73) is fixedly sleeved on the axle shaft (50), the second sun gear (73) is engaged with the second planet gears (74), the second planet gears (74) are engaged with the second ring gear (72), and the second ring gear (72) is fixedly connected with the axle sleeves (51), the second planet wheel (74) is connected with the second planet carrier (75), the second planet carrier (75) is connected with the speed reducer casing (71), and the speed reducer casing (71) is fixedly connected with the hub.
7. Electrically driven axle according to claim 6, characterized in that a ring gear carrier (511) is fixedly arranged on the axle sleeve (51), the second ring gear (72) being fixed to the ring gear carrier (511).
8. Electrically driven axle according to claim 6, characterized in that two second bearings (76) are provided between the retarder housing (71) and the axle sleeve (51).
9. The electrically driven axle according to claim 1, characterized in that said axle housing (11) comprises a first axle housing (111) and a second axle housing (112) connected to each other, wherein one of said electric machines (20) and one of said primary speed reducers are disposed in said first axle housing (111) and the other of said electric machines (20) and the other of said primary speed reducers are disposed in said second axle housing (112).
10. A vehicle comprising a front drive axle and a rear drive axle, both of which employ an electrically driven axle as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210637925.1A CN114701301A (en) | 2022-06-08 | 2022-06-08 | Electrically-driven axle and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210637925.1A CN114701301A (en) | 2022-06-08 | 2022-06-08 | Electrically-driven axle and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114701301A true CN114701301A (en) | 2022-07-05 |
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ID=82178092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210637925.1A Pending CN114701301A (en) | 2022-06-08 | 2022-06-08 | Electrically-driven axle and vehicle |
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| Country | Link |
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| CN (1) | CN114701301A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040163893A1 (en) * | 2003-02-22 | 2004-08-26 | Alfred Langen | Drive axle with integrated electric motor for a hydraulic pump |
| US20070036663A1 (en) * | 2005-08-10 | 2007-02-15 | Linde Aktiengesellschaft | Traction drive having an electrical converter |
| CN101961971A (en) * | 2010-09-06 | 2011-02-02 | 魏国成 | Automatic axle |
| CN208914949U (en) * | 2018-07-20 | 2019-05-31 | 长沙智能驾驶研究院有限公司 | Electric drive axle and vehicle |
| CN112648358A (en) * | 2021-01-05 | 2021-04-13 | 一汽解放汽车有限公司 | Hub reduction gear |
| CN114506184A (en) * | 2021-12-31 | 2022-05-17 | 南京清研易为新能源动力有限责任公司 | Vehicle and drive axle device thereof |
| CN114576289A (en) * | 2022-01-28 | 2022-06-03 | 徐州徐工传动科技有限公司 | Go and stay integrative stopper |
-
2022
- 2022-06-08 CN CN202210637925.1A patent/CN114701301A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040163893A1 (en) * | 2003-02-22 | 2004-08-26 | Alfred Langen | Drive axle with integrated electric motor for a hydraulic pump |
| US20070036663A1 (en) * | 2005-08-10 | 2007-02-15 | Linde Aktiengesellschaft | Traction drive having an electrical converter |
| CN101961971A (en) * | 2010-09-06 | 2011-02-02 | 魏国成 | Automatic axle |
| CN208914949U (en) * | 2018-07-20 | 2019-05-31 | 长沙智能驾驶研究院有限公司 | Electric drive axle and vehicle |
| CN112648358A (en) * | 2021-01-05 | 2021-04-13 | 一汽解放汽车有限公司 | Hub reduction gear |
| CN114506184A (en) * | 2021-12-31 | 2022-05-17 | 南京清研易为新能源动力有限责任公司 | Vehicle and drive axle device thereof |
| CN114576289A (en) * | 2022-01-28 | 2022-06-03 | 徐州徐工传动科技有限公司 | Go and stay integrative stopper |
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Address after: No.2676 Kejia Road, high tech Zone, Jinan City, Shandong Province, 250104 Applicant after: Lingong Heavy Machinery Co.,Ltd. Address before: No.2676 Kejia Road, high tech Zone, Jinan City, Shandong Province, 250104 Applicant before: LINGONG GROUP JINAN HEAVY MACHINERY Co.,Ltd. |